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Finding the Fourth Proportional to 202,960.20, 304,526.70 and 128,137.80

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Solution

The fourth proportional to 202,960.20, 304,526.70 and 128,137.80 is: 192,261.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,960.20 : 304,526.70 = 128,137.80 : x
  2. Step 2: Convert to fraction form
    202,960.20/304,526.70 = 128,137.80/x
  3. Step 3: Cross multiply
    202,960.20x = 304,526.70 × 128,137.80
  4. Step 4: Simplify right side
    202,960.20x = 39,021,381,379.26
  5. Step 5: Solve for x
    x = 39,021,381,379.26/202,960.20
  6. Step 6: Final answer
    x = 192,261.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.